We look at the division of 43755828 by 638 
The aim is to understand the frequency of 638 in 43755828.

Moving on to step 1:
638 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 638

Let's proceed to step 2:
638 goes into 43 0 times with a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Bring next digit (7) of the dividend behind the 43 and repeat the process: 437 / 638

Let's proceed to step 3:
The number 638 fits into 437 0 times, leaving a remainder of 437.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 437 leaves us with 437.
Fetch the next digit (5) from the dividend, attach it to 437 and continue: 4375 / 638

Advancing to step 4:
If we divide 4375 by 638, we get 6 and a remainder of 547.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 547 after subtracting 3828 from 4375.
Grab the next digit (5) from the dividend, add it to 547, then carry on: 5475 / 638

Let's proceed to step 5:
If we divide 5475 by 638, we get 8 and a remainder of 371.
Write down 8 as next digit of the result. 
Result so far: 68.0
If we subtract 5104 from 5475, we get 371.
Bring next digit (8) of the dividend behind the 371 and repeat the process: 3718 / 638

Going ahead to step 6:
638 can be fit into 3718 5 times, resulting in a remainder of 528.
Write down 5 as next digit of the result. 
Result so far: 685.0
Subtracting 3190 from 3718 leaves us with 528.
Grab the next digit (2) from the dividend, add it to 528, then carry on: 5282 / 638

Step 7:
The number 638 fits into 5282 8 times, leaving a remainder of 178.
Record the quotient 8 as the next digit in the result. 
Result so far: 6858.0
The remainder is 178 after subtracting 5104 from 5282.
Grab the next digit (8) from the dividend, add it to 178, then carry on: 1788 / 638

On to step 8:
When dividing 1788 by 638, we get 2 with a remainder of 512.
Write down 2 as next digit of the result. 
Result so far: 68582.0
If we take 1276 away from 1788, we end up with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

On to step 9:
638 goes into 5120 8 times with a remainder of 16.
The next digit of our result is 8. 
Result so far: 68582.8
Subtract 5104 from 5120 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 10:
The number 638 fits into 160 0 times, leaving a remainder of 160.
The next digit of our result is 0. 
Result so far: 68582.8
Subtracting 0 from 160 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 11:
638 can be fit into 1600 2 times, resulting in a remainder of 324.
Put 2 as the next digit of the answer. 
Result so far: 68582.802
Deduct 1276 from 1600 and we're left with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Advancing to step 12:
The number 638 fits into 3240 5 times, leaving a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 68582.8025
If we subtract 3190 from 3240, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 13:
If we divide 500 by 638, we get 0 and a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 68582.8025
Subtract 0 from 500 to get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 14:
When dividing 5000 by 638, we get 7 with a remainder of 534.
Put 7 as the next digit of the answer. 
Result so far: 68582.802507
The remainder is 534 after subtracting 4466 from 5000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Let's proceed to step 15:
638 can be fit into 5340 8 times, resulting in a remainder of 236.
Use 8 as the next digit of our solution. 
Result so far: 68582.8025078
The remainder is 236 after subtracting 5104 from 5340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Going ahead to step 16:
If we divide 2360 by 638, we get 3 and a remainder of 446.
Use 3 as the next digit of our solution. 
Result so far: 68582.80250783
If we subtract 1914 from 2360, we get 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

The final result is 68582.80250783 with a remainder of 4.46e-07.